Game boots but will not take credits or start; adjustments show impossible values such as 8 balls per game.

Nonsense adjustment values after a battery failure

Cause: Memory corrupted by a weak battery or a failing U4 6116 RAM.

Checks

• Step through the adjustments with the manual and note any invalid values.

Fix

• Reset the bad adjustments to proper values (or to factory defaults); replace the battery, and U4 if the problem returns.

Systems

• Bally 6803

Related tips

• Game boots but will not take credits or start
• CPU never starts: check the reset line at U1 pin 6
• Expected CPU LED flashes by game
• How to read the flashes on pre-1988 6803 games
• How to read the flashes on the last four 6803 games
• Missing lamp fuse changes the flash count
• Eight-flash LED code meanings
• Nine-flash LED code meanings

Source: Repairing Bally 6803 Pinball Games from 1985 to 1989, Clay Harrell (pinrepair.com)